Water-tube boiler



C. McADIE. WATER TUBE olLER.

APPLICATION FILED OCT. 2l. I9I5.

Patented Aug.v 15, 1916.

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WATER TUBE` BOILER.

APPLICATION FILED OCT. 2l. I9I5. 1 ,1 94,852 .Patented Aug. 15, 1916.

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WATER-TUBE BOILER.

Specification of Letters Patent.

Patented Aug. 15, 19,16.

Application filed October 21, 1915. Serial No. 57,047.

To all 'whom t may concern:

Be it known that I, COLIN MoADm, a citi- Zen of the United States, and aresident of Rutherford, in the county of Bergen and State of New Jersey,have invented a new and useful Improved 1Water-Tube Boiler, of which thefollowing is a full, clear, and exact description.

The object of the invention is to provide a new and improved water tubeboiler ar ranged to utilize the heatarising from the burning fuel in thefire box to the fullest advantage, and to insure rapid circulation ofthe water and quick generation of steam.

In order to produce the desired result, use is made of two drums spacedapart, two sets of water tubes connecting the drums with each other, thesets of water tubes being spaced apart, two compartments or chambers, ofwhich one is provided at one end with a fire box, and the twocompartments are connected with each other at the other end, the saiddrums extending in both compartments, one set of water tubes beinglocated in one compartment and the other set of water tubes beinglocated in the other compartment.

A practical embodiment of the invention is represented in theaccompanying drawings forming a part of this specification, in whichsimilar characters of reference indicate corresponding parts in all theviews.

Figure 1 is a sectional side elevation of the water tube boiler on theline 1-1 of Fig. 3; Fig. 2 is a similar view of the same on the line 2-2of Fig. 3; Fig. 3 is a plan view of the same with parts in section onthe line 3-3 of Fig. 1; and Fig. 4 is a transverse section of the sameon the line 4-4 of Fig. 2.

The housing or setting of the furnace of the boiler is provided with apartition 11 extending from the front of the housing to within a shortdistance of the rear end thereof to provide a transverse passage 14. Bythe arrangement described two compartments or chambers 12 and 13 areformed within the housing and are connected with each other at theirrear ends by the transverse passage 14. In the forward end of thecompartment 12 is arranged a fire box 15, and the front end of the othercompartment 13 is connected with a smoke flue 16 for carrying off theproducts of combustion arising from t-he burning fuel in the fire box15.

Tithin the housing 10 is arranged the boiler proper consistingessentially of a forward drum 17, a rear drum 18 and two sets of watertubes 19 and 20, connecting the drums 17 and 18 with each other. Thesets of tubes 19 and 20 are spaced apart and are located in the twocompartments 12 and 13, respectively.

The fire box compartment 12 is provided with a baiie 21 in the rear ofthe fire box 15 and rising from the bridge wall thereof in the rear ofthe front drum 17, the upper end of the baie terminating a distance fromthe roof of the compartment 12. A baille 22 extends from the roof of thecompartment 12 downwardly in front of the drum 18, and this baille 22terminates a short distance from the bottom of the compartment 12`Battles 23 and 24 are arranged in the return smoke compartment 13 andthe baiiie 23 extends from the top of the compartment 13 to the top ofthe drum 18 while the baffle 24 extends upward from the bottom of thecompartment 13 to the lowermost water. tube 2O at a point near the upperdrum 17, as

plainly shown in Fig. 2.

In practice, the drum 18 is preferably located at a lower level than thedrum 17, 'and when the furnace is in use the smoke and gases arisingfromthe burning fuel in the fire box pass upward around the po-rtion ofthe drum 17 located in the compartment 12, and between the upper ends ofthe water tubes 19 and then the smoke and gases f pass over the baffle21 and between the tubes 19 to finally pass under the bafiie 22 andaround the portion of the drum 18 located within the compartment 12. andgases next pass through the passage 14 into the return smoke compartment13 and laround the drum 18, then up between the tubes and around theportion of the drum 17 in the compartment 13 to nally pass into thesmoke flue 16. It will be noticed that by the arrangement described along passage for the smoke and gases is provided to utilize the heatunits of the burning fuel to the fullest advantage. It will also benoticed that the portions of the drums 17 and 18 and the tubes 19 in thecompartment 12 are subjected to a higher heat than the tubes 2O and theportions of the drums 18, 17 in the compartment 13 and consequently arapid circulation of the water is obtained, the water rising in thetubes 19 and descending in the tubes 20.

The top of the front drum 17 is connected with a drum located on top ofthe hous- The smoke ing 10 and from which leads a pipe 26 for carryingoil" the dry steam to the engine or other place of use. The lower orrear drum 18 is connected by a pipe 27 with a suitable source of watersupply, and the drum 18 is also provided with valve blow-oil pipes 29for cleaning the drum 18 of sediment. The ends of the drums 17 and 18are provided with the usual handhelds 301 81 for repairs and otherpurposes. The side walls of the housing 10 are provided with recesses 40having diverging side walls and openings 41 leading to the interior ofthe compartments 12 and 13 to permit the insertion of nozzles forconducting jets of steam or other iiuid into the compartments fordislodging. soot on the tubes 19 and 20. The openings el are normallyclosed by suitable doors 4t2.

F rom the foregoing it will be seen that the boiler proper is of simpleconstruction and permits the use of a large number of water tubes ineach set of water tubes 19 and 20 thus providing a large heatingsurface, and by locating the two sets of water tubes in the separatecompartments in which the heat varies, a very rapid circulation of thewater is obtained and a quick generation of steam takes place. Everypart of the boiler and furnace is readily accessible for cleaning,repairing or other purposes. It will also be noticed that in theconstruction of the boiler all flat or flattened surfaces, stay boltsand other undesirable features are completely avoided.

Having thus described my invention, I claim as new and desire to secureby Letters Patent:

1. A -water tube boiler, comprising a housing provided with a verticalpartition extending from the front of the housing to within a distancefrom the rear end of the housing to form a lire box compartment and areturn smoke compartment, the compartments being inclined and connectedwith each other at the rear ends, front and rear drums extendingtransversely through the partition in the front and rear ends of thecompartments, spaced sets of inclined water tubes connecting the drumswith each other and one extending in the lire box compartment and theother extending in the return smoke compartment, a fire box in theforward end of the lire box compartment and below the correspondingportion of the forward drum, and a smoke outlet at the forward end ofthe smoke return compartment.

2. A water tube boiler, comprising a housing inclined rearwardly anddownwardly and provided with a vertical partition extending from thefront upper end of the housing to within a distance from the rear lowerend of the housing to form within the housing a lire box compartmentinclined downwardly and rearwardly, and a return smoke compartmentinclined upwardly and forwardly, the rear lower ends of the saidcompartments being connected with each other, a front and upper drumextending transversely in the upper front ends of the said compartmentsand passing through the said partit-ion, a rear lower drum extending inthe rear lower portions of the said compartments and passing through thesaid partition, sets of inclined water tubes connect ing the drums witheach other and one extending` in the said lire box compartment and theother extending in the said smoke return compartment, a fire box in theupper portion of the fire box compartment and located beyond thecorresponding portion of the upper drum, and a smoke outlet leading fromthe upper end of the smoke return compartments.

3. A water tube boiler, comprising a housing inclined rearwardly anddownwardly and provided with a vertical partition extending from thefront upper end of the housing to within a distance from the rear lowerend of the housing to form within the housing a lire box compartmentinclined downwardly and rearwardly and provided with a verticalpartition extending from the front upper end of the housing to within adistance from the rear lower end of the housing to form within thehousing a fire box compartment inclined downwardly and rearwardly and areturn smoke compartment inclined upwardly and forwardly, the rear lowerends of the said compartments being connected with each other, a frontupper drum extending transversely in the upper front ends of the saidcompartments and passingthrough the said partition, a rear lower drumextending in the rear lower portions of the said compartment and passingthrough the said partition, sets of inclined water tubes connecting thedrums with each other and one extending in the said fire box compartmentand the other extending in the said smoke return compartment, a lire boxin the upper portion of the fire box compartment and located below thecorresponding portion of the upper drum, a smoke outlet leading from theupper end of the smoke return compartments, and spaced transversebaliies in the said lire box compartment intermediate the said drums,one of the baiiles extending upwardly in the rear of the lire box andthe other extending downwardly in the front of the portion of the lowerdrum within the fire box compartment.

t. A water tube boiler, comprising two drums spaced apart, two sets ofwater tubes connecting the drums with each other, the sets of watertubes being spaced apart, two compartments, of which one is provided atone end with a fire box and the two compartments are connected with eachother at the other end, the drums extending in both compartments and oneset of water tubes being located in one compartment and the other set ofwater tubes being located in the other compartment, and spacedtransverse baffles in the 'fire box compartment intermediate the saiddrums, one of the baffles extending upward at the rear of the fire boxand terminatinga distance from the roof of the lire box compartment andthe other baffle extending downward from the roof of the fire boxcompartment to within a distance of the bottom of the said fire boxcompartment. p

5. A water tube boiler, comprising a housing provided with a partitionextending from the front of the housing to within a distance of the rearend of the housing to form a fire box compartment and a return smokecompartment, the compartments being connected with each other at therear ends, front and rear drums extending in the front and rear ends ofboth compartments, spaced sets of water tubes connecting the drums witheach other, one extending Copies of this patent may be obtained for fivein the fire box compartment and the other extending in the return smokecompartment, a re box in the forward end of the fire box compartment, abridge wall in the rear of the said fire box, a baffle extending upwardfrom the said bridge wall in the rear of the front drum and terminatinga distance from the roof of the fire box compartment, a second bailleextending downward from the roof of the said lire box compartment infront of the said rear drum, the lower end of the second baiileterminating a distance from the bottom of the said fire box compartment,spaced front and rear baies in the said smoke return compartments, and asmoke outlet connected with the forward end of the smoke returncompartments.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

COLIN MGADIE.

Witnesses:

THEO. Gr. Hos'rER, GEORGE II. EMsLiE.

cents each, 'by addressing the Commissioner of Patents,

Washington, D. C.

